How to upload your world to Space Engineers server
Locate your save game folder.
C:\Users\{user}\AppData\Roaming\SpaceEngineers\Saves
Locate the desired world that you wish to upload, & Zip it.
Login to the Kinetic Panel.
Stop the server.
Go to the file manager.
Navigate to the following folder.
config/Saves
Upload and unarchive the zip.
Copy the name of the world.
Go to the settings page.
Locate the World name box.
Paste in the world name.
Start the server